Grease gun storage case



FIG. 1 is a top view of a new design for a grease gun storage case, the bottom view being a mirror image thereof;

FIG. 2 is a front elevational view;

FIG. 3 is a rear elevation view;

FIG. 4 is a right side elevation view; and,

FIG. 5 is a left side elevational view. 

The ornamental design for a “grease gun storage case,” as shown and described. 